Bar nut retaining/captive style fits the following models:-
Genuine Husqvarna Part
545
555
T540 XP
T5365 LiXP
536 Lixp
550 XP/XPG
560 XP/XPG
Part no 505197301
Knee Joint assembly for the Husqvarna chainsaws listed below. This is part of the chain brake mechanism. FITS CHAINSAW MODELS 540 XP MARK III, 545, 550 XP, 550 XPG, 555,...